Improvement in ships  rudders



E. ROBBINS. Ships Rudder.

No. 205,506. Patented July 2,1878.

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N. PETERS, PNDTO'L TMOGRAPHER WASHINGTON D C UNITED STATES PATENTOEEIoE.

ELISHA ROBBINS, OF COTUIT, MASSACHUSETTS.

IMPROVEMENT IN SHIPS RUDDERS.

Specification forming part of Letters Patent No. 205,506, dated July 2,1878; application filed May 27, 1878.

To all Whom it mm concern:

Be it known that I, ELIsHA ROBBINS, of Ootuit, of the county ofBarnstable, of the State of Massachusetts, have invented a new anduseful Improvement in Navigable Vessels and Rudders therefor; and dohereby declare the same to be described in the following specificationand represented in the accompanying drawings, of which- Figure 1 is aside view, and Fig. 2 a "ertical section, of the stern and rudder of avessel with my invention or improvement, in the carrying out of whichthe rudder-blade is extended forward as well as backward of its axis ofmotion and the stern-post or part or run against which the blade isarranged is recessed to receive the part of the blade that projectsforward of the axis of motion of the rudder. I urthermore, the part ofthe rudder-blade so projecting is recessed or notched to receive theintermediate pivotal bearing-arm projectin g from the stern-post or run.

In the drawings, A denotes the stern portion of the hull of a vessel,and B the rudder, of which a. I) represent the pivotal axis, or that ofthe rudder-post c and the lower pintle d.

The rudder-blade projects forward as well as aft of such axis, the part6 extending forward ofit being, when the rudder is anlidships, receivedinto a corresponding recess, f, formed in the stern-post or run 9, asrepresented.

In case of it being necessary for the rudder to have one or more pivotalsupports between the lower pintle and the rudder-post, I form therudder-blade with a notch or recess, h, for each of such supports, suchnotch or recess opening through the forward edge of the blade andextending back of the axis thereof, and I fasten to the run and projectinto the recess a pivotal bearing, Ir, through which I extend theintermediate pivot 1.

While. the rudder so made and applied is in the act of being turned tolarboard and the vessel is moving ahead, water from the starboard sideof the run will impinge against the auxiliary part c of the blade andaid in turnin g the rudder as well as in moving the stern to starboard.So, when the rudder is turned to starboard, water on the larboard sideof the run will act against the said auxiliary part. of

the rudder and aid in turning the rudder as Well as in moving the sternto larboard. Thus it will be seen that the said forward extension orauxiliary part 0 of the rudder, besides answering to increase thebearing-surface of the blade, operates, through the action of the Water,to aid the rudder in being turned either Way, and thereby enables therudder to be moved and supported in any position with much less powerthan would be required were the rudder without any such extension of itsblade forward of its axis of motion.

I claim as my invention as follows:

1. The hull provided with the run-recess j and the rudder-post andtoot-bearings, arranged in line as set forth, in combination with therudder having the pivotal post 0 and the blade-extension e disposedrelatively to the said bearings in manner as represented.

2. The hull provided with the run-recess f and the intermediate pivotalbearing k, in combination with the rudder provided with the forwardextension 6 of its blade and the notch or recess h therein to receivesuch bearing k, as specified.

ELISHA ROBBINS.

Witnesses:

R. H. EDDY, JOHN R. SNOW.

